A Portable and Fault-Tolerant Microprocessor Based on the SPARC V8 Architecture

  • Authors:
  • Jiri Gaisler

  • Affiliations:
  • -

  • Venue:
  • DSN '02 Proceedings of the 2002 International Conference on Dependable Systems and Networks
  • Year:
  • 2002

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Abstract

The architecture and implementation of the LEON-FT processor is presented. LEON-FT is a fault-tolerant 32-bit processor based on the SPARC V8 instruction set. The processors tolerates transient SEU errors by using techniques such as TMR registers, on-chip EDAC, parity, pipeline restart, and forced cache miss. The first prototypes were manufactured on the Atmel ATC35 0.35 µm CMOS process, and subjected to heavy-ion fault-injection at the Louvain Cyclotron. The heavy-ion tests showed that all of the injected errors ( 100,000) were successfully corrected without timing or software impact. The device SEU threshold was measured to be below 6 MeV while ion energy-levels of up to 110 MeV were used for error injection.